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Back in 2010, I wrote a web application called PMRetract to monitor retraction notices in the PubMed database. It was written primarily as a way for me to explore some technologies: the Ruby web framework Sinatra, MongoDB (hosted at MongoHQ, now Compose) and Heroku, where the app was hosted. I automated the update process using

Two days ago, Kaggle began a new competition called the Otto Group Product Classification Challenge. In this competition, participants are challenged to create a model to correctly classify products between 9 product categories (fashion, electronics, etc.). The data consists of 200k products with 93 features each. The features have been obfuscated so it’s hard to … Continue reading...

The concept of “tidy data”, as introduced by Hadley Wickham, offers a powerful framework for data manipulation, analysis, and visualization. Popular packages like dplyr, tidyr and ggplot2 take great advantage of this framework, as explored in several recent posts by others.
But there’s an important step in a tidy data workflow that so...

I spend much of my day sitting in front of a screen, coding or writing. To limit the strain on my eyes, I use a dark theme as much as possible. That is, I write with light colored text on a dark background. I don’t know why this is not the default in more software

by Gary R. Moser Director of Institutional Research and Planning The California Maritime Academy I recently contacted Joseph Rickert about inviting Vim guru Drew Niel (web: vimcasts.org, book: "Practical Vim: Edit Text at the Speed of Thought") to speak at the Bay Area R User Group group. Due to Drew's living in Great Britain that might not be easily...

Hurry! The abstract submission deadline for the 3rd R in Insurance conference in Amsterdam, 29 June 2015 is closing soon. You have until the 28th of March to submit a one-page abstract for consideration. Both academic and practitioner proposals related...

by Bob Muenchen As the R programming environment has grown in capability and popularity, so have the number of organizations planning to migrate to it from proprietary tools. I’ve helped members of various organizations transition from SAS, SPSS and/or Stata to R (see Workshop … Continue reading →

(This is a guest post by my friend Yoni Sidi, a PhD candidate in statistics at the Hebrew University) Background The Israeli elections are coming up this Tuesday, 17/3/2015 (i.e.: tomorrow!). They are a bit more complicated than your average US presidential race. The elections in Israel are based on nationwide proportional representation. The electoral … Continue reading...

The two previous posts described how you can make histograms with basic R and the ggplot2 package. This third and last part of our histograms tutorial will look at how to make a histogram with ggvis. This package is similar to ggplot2, as it is also based on “the grammar of graphics”. However, ggvis has
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In our previous post you learned how to make histograms with the hist() function. You can also make a histogram with ggplot2, “a plotting system for R, based on the grammar of graphics”. This post will focus on making a Histogram With ggplot2. Want to learn more? Discover the DataCamp tutorials. Step One. Check That
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